In 1974 rural districts were abolished and the border between the East Riding of Yorkshire and the North Riding of Yorkshire was realigned. The North Riding changed its name to North Yorkshire.
Since 1974 Scagglethorpe has been in North Yorkshire, specifically within the Ryedale District.

Research Tips

The FamilySearch wiki on the ecclesiastical parish of Settrington. According to data for the writer's own family, Scagglethorpe was part of Settrington by 1830.

A Vision of Britain through Time also provides links to three maps of the East Riding, produced by the United Kingdom Ordnance Survey, illustrating the boundaries between the civil parishes and the rural districts at various dates. These maps all blow up to a scale that will illustrate small villages and large farms or estates.